Hi anbax,
Simmons and other manufacturers can have many different names for the same mattress and it’s one of the ways that they discourage comparison shopping.
If you do a google search on Simmons Seabrook though … one of the outlets that carries it lists the layering description here (click on features).
While this doesn’t really have much meaningful information in it … it at least gives you a general idea of the materials in the mattress if you can 'translate" the names they use.
Basically … it contains 2.5" of memory foam which is breathable (and probably lower density in the range of 3.5 lbs but this isn’t listed and could be different).
This is over 3/8" of polyfoam of unknown quality/density (but it’s only a thin layer)
This is over 2.5" of “independent support technology” which is talalay latex (ILD not known though but ILD is not a “quality” spec).
This is over a 5" polyfoam support core of unknown quality/density.
And at the bottom is a 2" firm polyfoam base layer again of unknown quality/density
In complex layerings like this … it’s not really possible to “duplicate” the feel of the mattress but it does indicate that a memory foam latex combination comfort layer may be a combination you like. Of course there are infinite variations of this combination but at least it will give you a reference point that you can test other mattresses that may “feel” similar to you.
Bear in mind though that “feel” is very subjective and if it has been more than a few hours then our memories of “feel” are not accurate any more. It’s usually better to “target” more objective things like pressure relief, alignment, and other preferences that you measure every mattress against rather than trying to match one mattress to the “standard” of another. In other words … the more specific and objective you can be about exactly “why” you like a particular mattress … the easier it is to look for those specific qualities in another. Besides the two basic functions of every mattress which are Pressure relief and Posture and alignment … some of the more objective preferences that you may want to evaluate based on your testing experiences and knowledge of the materials and the outlet you are working with are in post #2 here.
So if you can describe specifically why you liked what you did and the materials in the mattress you liked … it would be helpful. If you only describe the names of the mattresses you liked … unless they happen to now the specifics of that mattress very well … it’s not likely to be something that will help much and you would need to test mattresses there to see which came closest to what you remember.
The goal is always to test every mattress against PPP (Pressure relief, Posture and alignment, and Personal preferences). This can keep your testing more objective and help you evaluate each mattress against others rather than using one mattress (instead of specific qualities you can describe and identify) as a standard.
Phoenix